Comparison of ultrasonic measurement of biparietal
diameter and last menstrual period as a predictor of day of delivery in women with regular 28 day-cycles.
Hence to measure the biparietal
diameter, an appropriate image of the fetal head is to be obtained.
Compared with term infants, the preterm infants' mean bifrontal diameter was 13% smaller, their biparietal
diameter was 14% smaller, and their transverse cerebellar diameter was 9% smaller.
Two sets of medians were computed based on gestational age derived from either last menstrual period or biparietal
diameter ultrasound measurements: ultrasound median ITA = [10.
Unfortunately, taking abdominal circumference has more interobserver and intraobserver variation than either femur length or biparietal
We fitted mixed-effects models to estimate longitudinal growth curves for femur length (FL), head circumference (HC), abdominal circumference (AC), biparietal
diameter (BPD), and estimated fetal weight (EFW).
Appropriate fetal growth was defined by the presence of ultrasonographic signs (when biparietal
diameter and abdominal circumference were between the 10th and 90th percentiles) according to the normograms of Campbell and Thoms (6) and by postnatal confirmation of a birth weight between the 10th and 90th percentiles according to our population standards after correction for maternal height, weight, and parity and the sex of the newborns.
The ultrasound algorithms included fetal measurements of biparietal
diameter, head circumference, abdominal circumference, and femur length in various combinations.
Our aim was to study, among nonsmoking women, the influence of personal exposure to benzene in the air, seen as a marker of traffic-related air pollution, on measures of fetal growth (birth weight, head circumference, biparietal
diameter) assessed during pregnancy by ultrasonography and at birth.
diameter and crown-rump length in fetuses with Down's syndrome: implications for antenatal serum screening for Down's syndrome.
They found that when abdominal diameter exceeded biparietal
diameter by 2.
There was no significant association between chromosomal abnormalities and, chorioid plexus cysts, renal abnormalities other than pyelectasis, echogenic cardiac foci, a single umbilical artery, polyhydramnios, extremity abnormalities, short femurs, or an abnormal biparietal
diameter to femur length ratio.